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		                        | National Stock Number:
 5305-01-029-4666
 
 Federal Supply Class:
 5305
 
 National Item Identification Number:
 010294666
 
 Description:
 SCREW,CAP,SOCKET HEAD
 
 Detail:
 An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.
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 Manufacturer Information:
 
 | 8685-690017-3 | 28298 | SMITH AND SMITH AIRCRAFT CO |  | 8685-690017-3 | 89372 | ROCKWELL INTERNATIONAL CORP NORTH AMERICAN AIRCRAFT OPNS | 
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 Techincal Specification:
 
 | THREAD SERIES DESIGNATOR | UNC |  | NOMINAL THREAD DIAMETER | 0.250 INCHES |  | THREAD QUANTITY PER INCH | 20 |  | THREAD CLASS | 2A |  | THREAD DIRECTION | RIGHT-HAND |  | THREAD LENGTH | 0.310 INCHES MINIMUM |  | FASTENER LENGTH | 0.500 INCHES NOMINAL |  | MATERIAL | IRON ALLOY 660 OVERALL |  | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |  | HEAD STYLE | FLAT COUNTERSUNK |  | HEAD DIAMETER | 0.470 INCHES NOMINAL |  | COUNTERSINK ANGLE | 82.0 DEGREES NOMINAL |  | INTERNAL DRIVE STYLE | HEXAGON |  | WIDTH ACROSS FLATS | 0.156 INCHES MINIMUM AND |  |  | 0.158 INCHES MAXIMUM |  | THE MANUFACTURERS DATA |  |  | MANUFACTURERS CODE | 89372 |  | DESIGN CONTROL REFERENCE | 8685-690017-3 | 
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